The director revealed that while Moriarty (Jared Harris) is the film's central villain, he is not to blame for a lot of what happens, adding that the character simply took advantage of human nature.
"I thought an important aspect of the philosophy behind the film, if you will, is that maybe Moriarty isn't the problem," Ritchie told Movieline. "Maybe the problem lies in the human condition."
He continued: "I like that because it stops pointing the finger at anyone in particular and it points more at the human condition than it does at an individual. In a traditional sense we've got a villain that we can blame, but then he points the finger at everyone else and I think that's a plausible accusation that he makes."
Robert Downey Jr, who plays Sherlock Holmes in the film, recently described the set of Sherlock Holmes 2: A Game of Shadows as a democracy.
In October, it was reported that a third instalment in the Sherlock Holmes series is in the works.
Sherlock Holmes 2: A Game of Shadows will be released in US and UK cinemas on December 16.
Watch the trailer for Sherlock Holmes 2: A Game of Shadows below:
See a poster gallery from Sherlock Holmes 2: A Game of Shadows below: